Annealing-kiln



(No Model.) 4 Sheets-Sheet 1.

E. WALSH, J1-. ANNEALING KILN.

No. 578,378. Patented Mar, 9, 1897.

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No. 578,378. Patented Mar. 9, 1897.

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179.578,378. Patented Mar. 9, 1897.

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EDWARD VALSH, JR., OF ST. LOUIS, MISSOURI.

ANNEALI-NG-KILNr SPECIFICATION forming part of Letters Patent No.578,378, dated March 9, 1897.

Application filed May 14, 1895. Serial No. 549,287. (No model.)

To all whom t may concern.:

Be it known that I, EDWARD WALSH, Jr. a citizen of the United States,residing in the city of St. Louis, State of Missouri, have invented acertain new and useful Improvement in Annealing-Kilns, of which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawings, forming part of this speciiication,wherein- Figure 1 is a side-elevational view, partly in section. Fig. 2is a cross-sectional view on line 2-2, Fig. l. Fig. 3 is a horizontalsectional view showing the plan of the elevator and traveling bars. Fig.4 is a side-elevational view of the elevator, somewhat enlarged. Fig. 5is an enlarged sectional view through the elevator and stationary bars,looking from the end of the kiln. Fig. 6 is a cross-sectional viewthrough the elevator-bars on line 6 6, Fig. 4. Fig. 7 is across-sectional view through the traveling rods. Fig. 8 is aside-elevational view of the end of the traveling rods. Fig. 9 is anedge view of the camsleeve. Fig. lO is a side-elevational view of themeans for operating the cam-rods. Fig. l1 is a sectional view throughthe side wall of the kiln, showing one of the I-beams projecting, whichbeam forms a support for the bearing of the screw-rod. l

This invention relates to a new and useful improvement inannealing-kilns for plateglass; and it consists in the construction, ar-

rangement, and combination of the several` parts, all as willhereinafter be described and afterward pointed out in the claims.

In the drawings, represents the kilnwalls, which are provided with peepor operating holes 16 at convenient points, through which the operatormay see and manipulate the plates of glass.

Just to the rear of the door 17 at the front of the kiln, upon which theplates are rst placed in introducing them into the kiln, is anelevator-pit in which is located an elevator, hereinafter more fullydescribed.

Beneath the elevator-pit are arranged the air and gas iiues 18 and 19,respectively, and the combustion-chamber 20. The products of combustionpass rearwardly through the flues 21, arranged beneath the floor of thekilnway and which are formed by the partitions 22, to a stack. (Notshown, but which is located at the rear end of the kilnway.)

In line with the floor 17 are stationary bars 23, which are mounted inbar-rests 24, yarranged on suitable supports, preferably in the form ofI-beams 24h, which extend transversely the elevator-pit and are mountedin boxes arranged in the side walls of the kiln.

Bars 23 are composed of two side plates 25,'

bar-rests 24, and this connection permits longitudinal expansion withoutunduly cramping the bars.

The elevator consists of a series of bars 29, which are composed of sideangle-irons 30, an interposed rod 3l, to which the side angleirons areattached by bolts 30, and nonheat-conducting material in the form offirebricks 32, which are supported on the rods 3l and clamped betweenthe angle-irons 30, said bricks extending above the upper edges of theangle-irons. Rods31 have projections or extensions 33 arranged alongtheir length and which are preferably slotted longitudinally to receivepins on the elevating-arms 34. In a position of rest these elevator-barsare supported on table-like extensions 24a of a stationary bar-rest 24,as shown in Fig. 5, so that the elevator-bars will be slightly below theplane of the stationary bars 23, whereby when glass is placed upon thebars 23 it may be pushed back onto the bars Without contactin g with theelevator-bars, or the elevatorbars being raised will elevate the glassso that it can be pushed back onto the traveling bars 40, as shown bythe dot-ted lines in Fig. 4.

Elevating-arms 34 are mounted upon rockshafts 35,j ournaled in suitablebearings,'which shafts are transversely disposed across the elevator-pitand project out beyond the side walls of the kiln, where they havemounted uponAt-heir ends rock-arms 36. I The ends of rock-arms 36 areconnected by a link 37. The elevator is operated by a cylinder 38, onepreferably being on each side, the pitmen of which cylinders areconnected to rock-arms 39. Suitable valves and supply and exhaust pipesare provided for the cylinders, (not ICO shown,) and the cylinders arepreferably piv- .oted in a frame so as to have an oscillating movementfor obvious reasons.

Upon admitting pressure above the piston the elevator rises, and theplate of glass may be shoved on the upper tier. Gradually exhausting thepressure from above and admiting it at the lower end of the cylinderwill restore the elevator to its normal position.

The kiln shown in the drawings is provided with two tiers of travelingbars 40 and 40a, which extend from the elevator-pit to the rear end ofthe kiln. The traveling bars of these tiers consistof. two plates 41,preferably in the shape of angle-irons, which coniine between them, atsuitable distances apart, camblocks 42, secured in place bythrough-bolts 45a. These cam-blocks are recessed, as at 43, at theirupper ends, in which recesses are supported strips 44,` extending fromblock to block. To support these strips between the blocks,through-bolts 45 are arranged beneath them, said bolts passing throughthe angleplates 4l and serving the dual function of supporting thestrips 44 and clamping said strips and lire bricks between theangleplates. Above the strips and cam -blocks tire-bricks 46 are placed,the upper edges of which extend above the angle-irons.

The traveling bars, through the medium of their cam blocks, rest looselyupon oppositely-centered cams 47, mounted upon transverse-ly-disposedshafts 48, with the exception that l at their extreme ends, preferablythe rear ends, the cam-blocks inclose the cams by straps 49a. In thismanner the alternate bars of a series have an opposite cyclical movementin the same direction, i. c., one set being up when the other is down,said movement being directed from one end only, the free end following,but being permitted to expand and contract independently of the cams.This construction permits varying expansions and contractions of any ofthe bars without affecting the others, which expansion would cause thebars to warp or buckle, tending to bind their movement.

The cam-shafts 48 are mounted in suitable bearings 49, which arearranged between I- beams 50, said bearings being located at differentpoints along the shaft, as shown in Fig. 3. These cam-shafts extend outbeyond the wall of the kiln at one side and have mounted upon their endsworm-wheels 51. One of the I-beams 50 also extends out beyond the sidewall of the kiln, as at 52, and affords a support for a bearing 53, inwhich is mounted a shaft 54, running the length of the kiln, upon whichshaft are mounted worm-screws 55, gearing with the wheels 5l. In thismanner the cam-shafts are operated, it being of course understood thatthe two tiers are independent of each other, in order that they may berun at different speeds.

Any suitable power may be employed to rotate the worm-shaft 54.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. In an annealing-kiln, the combination with cams which are alternatelyoppositely centered, and the means for revolving said cams, of travelingbars which rest upon the cams through the medium of cam-blocks, and astrap on some of said blocks for connecting one end only of said bars tothe cams; substantially as described.

2. In an annealing-kiln, the combination with a series of travelingbars, of means for imparting a cyclical movement to said bars,

said means comprising a series of oppositelycentered revolving cams towhich are imparted complete revolutions, said bars being connected atone of their ends only to a set of cams; substantially as described.

3. The combination with side plates, of cam-blocks arranged between saidplates at different points, strips which are supported by the blocks,and non-heat-conducting material which is arranged above the strips andbetween the side plates continuously the length of the strips;substantially as described.

4. The combination with an gie-irons forming side plates, of cam-blocksarranged therebetween at different points, strips which are supported attheir ends by the blocks, bolts passing through the side plates andunder the strips for supporting the middle portion `of the strips, andnon-heat-conducting material between the side plates and on the strips;substanti( lly as described.

5. In an annealing-kiln, the combination with the stationary bars 23, ofbar-rests 24 for supporting the same, elevator-bars 29,which normallyrest upon table-like extensions 24 extending from said bar-rests,belowthe plane of the supports for the stationary bars 23 and means foroperating the elevator-bars; substantially as described.

6. In an annealing-kiln, the combination with the stationary bars, ofbar-rests therefor which permit expansion and contraction of saidstationary bars, elevator-bars which normally rest upon table-likeextensions extending from said bar-rests below the plane of the supportsfor the stationary bars, slotted projections extending down from saidelevator-bars, and elevating-levers having pins in the ends which passthrough said slots for permitting expansion and contraction of saidbars, and at the same time forming a connection which permits theelevating-levers to swing and raise the elevator-bars; substantially asdescribed.

7. The combination with stationary bars which consist of two sideplates, a rod, and non-heat-conducting material between the plates, ofbar-rests provided with jaws to receive said bars and having anindependent support for the movable elevator-bars in a plane below thejaws for the stationary bars,

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and elevator-bars which are supported in their extend transversely thekiln, of cams mounted on said shafts, traveling bars which are actuatedby said cams, bearings for said shafts, Worm-Wheels on the ends of theshafts, I- beams for supporting bearings, said beams extending outbeyond the side Wall of the kiln, bearings on said projecting ends, anda Worm-shaft mounted in said bearings; substantially as described.

9. In akiln, the combination With the Walls,

of beams which extend from Wall' to Wall and project outside, travelingbars arranged in the kiln, and means for actuating said traveling bars,said means being mounted upon the projecting ends of the beams;substantially as described.

In testimony whereof I hereunto afx my signature, in presence of twoWitnesses, this 10th day of May, 1895. Y l

EDWARD WALSH, JR.

Witnesses:

F. R. CORNWALL, HUGH K. WAGNER.

